Drilling device



June 6, 1950 R. W. ANDREAssoN A 2,510,203

DRILLING DEVICE Filed May 17, 194e 2 sheets-sheet- 1 i4 6 E /z ll l Il j l i4 26 BY v R. w. ANDREAssoN June 6,` 1950 DRILLING DEVICE 2 Sheets-Sheet 2 Filelmay 17, 1946 ri l atenteci june 6, 1.95.()

UNITED STATES PATENTv OFFICE DRILLING DEVICE Rudolf W. Andreasson, Franklin, Mich.

Application May 17, 1946, Serial No. 670,327

10 Claims.

This invention relates to drilling devices and particularly to devicesl employed in connection with drills enabling the effect of oil hole drills to ybe obtained without actually having passages completely imbedded within the drills for the passage of oil, cutting compound or the like, and constitutes an improvement on the construction shown and claimed in ,my copending application for Letters Patent of the United States on Drilling device, led September 27, 1944, and serially numbered 556,008, now Patent No. 2,409,525.

The principal object of the present invention is to provide a device of the character disclosed and claimed in my copending application above referred to but of improved construction and design and which will operate more eiiiciently.

Other objects of the invention include the provision of a drilling device comprising a body provided with a bore for receiving a drill having flutes and lands and in which the lands are relieved between their opposite edges to cooperate with the body to provide liquid passages, the body being formed for non-rotatable reception of the drill at one point in its length but being movable axially of the drill, means being provided for sealing the relief in the lands to the body, and a sleeve rotatably mounted on the body through which a cutting compound or the like may be introduced to the body and through suitable openings in the body to the relief in the lands of the drill out- Wardly of the seal, this much forming the broad disclosure in my pending application above identied, and in addition thereto, and in accordance with the present invention, the sleeve rotatable about the body is provided with a nose portion projecting axially beyond the body for actual contact with the work being drilled; the provision of a construction as above described in which the nosepiece serves to cooperate with the slotted end of the body through which the chips are discharged irom the flutes in the drill to form, in eifect, a centrifugal pump aiding in the discharge of the chips and the drilling compound `or other liquid employed in connection therewith; the provision of a construction as above described having a novel body construction; the provision of a construction as above described having a driving member associated with the body in a novel manner; the provision of a construction of the general type above described in which the drive between the body and the drill is through a member having an opening therein of a shape substantially fully complementary to the cross-sectional configuration of the associated drill; the provision of a construction of the general type above described 2 including a novel means for sealing the relief in the lands of the drill to the body; and the provision of a device of the type described including certain other novel features of construction.

The above being among the objects of the present invention, the same consists in certain novel features of construction and combinations of parts to be hereinafter described with reference to the accompanying drawings, and then claimed, having the above and other objects in view.

In the accompanying drawings which illustrate a suitable embodiment of the present invention and in which like numerals refer to like parts throughout the several different views,

Fig. l is a perspective view of my improved drilling device shown with a drill in cooperative relation with respect thereto;

Fig. 2 is a partially broken, side-elevational view illustrating the application of the present invention as shown in Fig. 1 in the drilling of a hole in a piece of Work;

Fig. 3 is a slightly enlarged horizontal sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a slightly enlarged fragmentary vertical sectional View taken centrally through the device of the present invention as on the line 4-4 of Fig. 2;

Fig. 5 is a horizontal sectional view taken on the une s-s of Fig. 4;

Fig. 6 is a fragmentary horizontal sectional view taken on the line 6 6 of Fig. 4;

Fig. 7 is a horizontal sectional view taken on the line l-'l of Fig. 4;

Fig. 8 is an exploded view of the two parts of the body and the driving member of the drilling device shown in the preceding views; and

Fig. 9 is a view similar to Fig. 8 but showing the same parts rotated about their axis from the position shown in Fig. 8.

The device oi the present invention consists essentially of a body having a cylindrical bore therethrough of a diameter to relatively closely but slidably receive a drill of the intended diameter to be employed in connection therewith. The drill may have either straight utes or may be of the conventional twist drill type having heli-cally disposed flutes. of the drill are relieved between their opposite edges so as to form flow paths for the cutting compound or the like employed in the drilling operation and means xed with respect to the body are provided in tted relation with respect to the relief in the lands and/ or the flutes in the drill to cause the body to rotate with the drill without restricting axial sliding movement be- In either case, the lands ythe bore of the body.

tween them. Additionally, means are provided in cooperating relation between the body and the relief in the lands of the drill so as to prevent the ow of liquid fed to such relief outwardly along the relief, thus to confine the flow toward the point of the drill. The body is provided with passages leading from its exterior surface to the relief in the lands of the cooperating drill below the seal above described so as to provide for the flow of cutting compound or the like to such relief. In order to feed such cutting compound or the like to these passages, particularly in applications where the drill revolves, a sleeve or housing is provided in surrounding relation with respect to the body and rotatable with respectthereto and it in turn is provided with a passage therethrough communicating with the passages in the body. The passage in the sleeve is connected to a suitable source of cutting compound or the like.

.Y With the construction as thus far described, in a drilling operation the drilling device is associated with a suitable drill, the drill brought into contact or approximate Contact with the work, the drilling device also brought into contact with the work. drilling compound or the like is fed through the sleeve to the reliefs in the lands of the drill, and the drill is rotated and fed into the work. The cutting compound or the like flows through the reliefs in the lands toward the point of the drill and is confined thereto the fit between the unrelieved portions of the lands and As the drill penetrates the work, the walls of the bore being drilled also serve to seal the reliefs in the lands from the flutes and, consequently, cause the cuttingcompound to be forced down through the reliefs in the lands towards the point of the drill from which it escapes to the flutes of the drill at the point, carrying the chips being cut up the flutes with it to the drilling device from which the cutting compound and the chips escape through suitablenholes or slots cut in the body in Aregistryvvith the flutes.

Thus, in this type of construction, the reliefs in theY lands in Vcooperation with the bore of the rbody and theribore being drilled serve the same purpose as oil holes in a conventional oil hole drill, but in this caserand vparticularly in the. case of smaller size drills, the cross-sectional area of the passage provided for the flow of the cutting cornpound maybe made much larger than the crosssectional area of the oil holes of a conventionally Vformed oil hole drill of V'the same size so that a greater amount of cutting compound may be fed to the point of the drill with Yall of the attendant advantages. Furthermore, the cutting compound inflowing downthe bore being drilled is in direct Vcontact with the walls of the bore being drilled over the fullflength thereof serves to extract heat from the work as well as from the drill.

'I'he above description and explanation is equally applicable to the construction shown and described in my copending application, above identified, as it is to the present invention. present invention constitutes an improvement over the construction shown and described in my copending application, above identified, because of the following described differences in construction.

In the construction shown in my prior applica- -tion above identified the body itself directly contactsfthe work, or-the jig in which the work is held. Because of the fact that the body rotates alli tion. In accordance with the present invention the sleeve which surrounds the body and through which the cutting compound or the like is introduced is provided with a nosepiece through which the contact between the drilling device and the work, or the jig for the work, is made. Inasmuch as the sleeve is relatively stationary and the body rotates Within it, this eliminates the objectionable feature above referred to. Additionally, this nosepiece so cooperates with ythe slotted lower end of the body as to form a housing for such slotted 4end of the body which thereby serves in the nature of a centrifugal pump which constantly acts on vthe cutting compound and the chips in the flutes of the drill to draw the same from such flutes and discharge them from the drilling device. This feature, of course, materially enhances the efficiency of the device.

Additionally, in accordance with the present invention, the drive between the body and the drill includes a, plate member `having an opening therein which is provided with an opening-therethrough for reception -of the drill which is preferably complementary to the cross-sectional configuration of the drill so that driving engagement occurs between the plate and the drill not only through the relief in the lands but also through the fiutes of the drill, thus providing ample driving force with a minimum of friction regardless of the cross-sectional configuration of the flutes and/or the reliefs in -thelands of the drill.

Another feature of the present invention -resides in the manner of securing the driving plate to the-body. In accordance with the present invention, the body is made in two axially separable sections which have telescopic engagement with each other and are formed to receive the driving plate betweenthem in rotatably fixed relation without the need of any extraneous securing means. This is an improvement over my prior construction vin .which screws were employed to hold the driving member in position.

An additional feature of the present invention is in connection with the employment of rubber -blocksbetween the reliefs in the lands of the drill :and the .bodyto seal such lands against the escape of the cutting compound from the body away .from :the point of the drill, such rubber blocks providingran equally .eicacious and muchmore simple sealing means thanthat disclosed-in my Vprior application. above identified.

Referring now to the accompanying drawings and. particularlyto. the body above referred .to is indicated generailyat itl, the sleeve at l2 :and the nosepiece Yat it, the body lil, as best brought out in Figs. Ll, 8 and 9 comprises an upper portion or section l@ and lower portion or -sec- .tion

ftion, that shown by-vvayr of illustration'being that covered in my United States Patentv No. 2,370,7G6 granted vMarch 6, 1945. Adjacent its lower edge, thesecton it is provided'with a peripheral groove g28 which forms a distributing channel for the cutting compound or other liquid to be employed in Va drilling operation, and one or more radial holes -their edges as at 36. Where, as in the case shown,

the reliefs 36 and the lands 32 are diametrically opposed to each other, then, of course, the holes 30 are diametrically opposed to each other.

The lower section I8 of the body I0 comprises a sleeve like portion having a central bore 38 of the size to closely but slidably receive the drill 22 therein, and its upper end is relatively closely telescopically received within the upper section I6 in concentric relation with respect thereto. Intermediate its ends, it is provided with a peripheral flange 40 which, as brought out in Figs. 8 and 9, has its upper portion flatted off as at 42 on diametrically opposite sides for a purpose which will hereinafter be explained. Its lower end is slightly reduced in diameter as best brought out in Fig. 9, and such lower end is provided with slots or notches 44 for the escape of cutting compound and chips fed thereto from the flutes of thev drill. In this respect, it will be appreciated that there are as many notches or slots 44 as there are flutes in the drill to be employed in conjunction therewith, and the slots .or notches 44 arer so angularly related with respect to the holes 30 that when the holes 30 are maintained in alignment with the reliefs 36 in the drill, the slots or notches 44 are maintained in alignment with the flutes 34.

The depth of the bore 46 in the section I6 is equal to the distance from the top of the section I8 to the bottom edge of the flats 42. The bottom end of the section I6 is milled out or other-v wise suitably formed to provide a diametrical groove 48, the width of which is equal to or very slightly greater than the distance between the flats 42 of the section I8, and the depth of which is substantially equal to or slightly greater than the depth of the ats 42. Thus, when the upper end of the section I8 is projected into the bore 460i section I6 which it closely but slidably fits, the upper section I6 is rotated relative to the lower section I6 until the flatted portion of the ange 40 is received in the groove 48 of the upper section, upon which the two sections are moved axially to the limit of their positions, which thus non-rotatably locks these two sections together. In such case, inasmuch as the diameter of the flange 40 is equal to the diameter of the section I6, these two cooperate to provide a cylindrical peripheral portion of the same diameter.

In order to lock the body IU for equal rotation with the drill 22 or its equivalent, a plate member 56, best brought out in Fig. 6 is employed. The plate member 50 is made from a piece of flat stock and is centrally provided with an opening 52 therethrough which is of a shape to non-rotatably receive the drill. Broadly only this isnecessary, but in accordance with a more limited phase of this invention the opening 52 is complementary to the cross-sectional configuration of the drill 22 which relatively closely but slidably receives it. Inasmuch as very little effort is required to rotate the body I with the drill 22, or its equivalent, the driving plate 50 may be made relatively thin.

In order to non-rotatably lock the driving plate D to the body IU, the plate 5I), as best brought out in Fig. 6, is made in the form of a metal disk, of the same diameter as the upper end of the section I8, having two diametrically opposite sides thereof flatted off as at 54. The upper end of the body section I8, as best brought out in Figs. 6, 8 and 9, is diametrically grooved as at 56 to a width corresponding to the width of the driving plate 58 across the flats 54, so as to relatively closely but removably receive the driving: plate 56 therein, and for a depth substantially equal to the thickness of the driving plate 56.. The diametrical distance across the circular edge portions of the driving plate 56 being equal to the diameter of the upper portion of the section I8, when the driving plate 56 is received in the groove 56 of the section I8 the upper end of the section I8 with the driving plate 56 therein may be projected into the bore of the upper section I6.r Inasmuch as the upper end or" the section I8 substantially abuts the shoulder formed between the bores 20 and 46 of the upper section I6 when these sections are assembled together, it will be appreciated that the driving plate 56 is thereby axially maintained within the groove 56. Preferably, the upper end of the bore 46 is radiallyA relieved as at 58 so as to allow the driving platef 50 some degree of endwise shifting movement; when assembled to the body so as to insure cen-l tering of the opening 52 with the bores 26 andf- 36 of the two body sections. The driving plate 50 thus being non-rotatably fixed with respect; to the body section IS and the body section I6? being non-rotatably associated with the body section I8, it will be appreciated that both body sections and the driving plate in assembly form a unit which is constrained for equal rotation with the drill 22 or its equivalent.

In my prior patent above identified, two diiferent means are disclosed for sealing the joint between the body and the relief in the lands: against the escape of cutting compound or the like upwardly towards the shank of the drill. One of these means consists of a flexible flap carried by the body and pressed into the relief of each land by the pressure of the cutting com-- pound or the like introduced into the device. The other comprises a metal ball slidably received in. a radial opening in the body and pressed into engagement with a complementarily sectioned relief in the land by the fluid pressure of the cutting compound. The first of the above described sealing means was diiiicuit to apply andi the second described form not too eiiicient. Accordingly, a simpler and more efiicient form of Sealing device is disclosed in connection with the present device and this will now be described.

The upper end of the body section I3 is downwardly slotted from its upper face and radially through the wall thickness thereof, as at 66. The slots 6I) equal in number and angular spacing to the lands in the drill employed. Where the drill is a straight uted drill, then, of course, the slots 60 will be parallel to the axis of the body but where, as in the case shown, the drill is a, twist drill with helically arranged flutes andlands, then the slots 66 are arranged at the same angle to| the axis of the body as the flutes and lands are arranged to the axis of the drill, and this arrangement is shown by way of illustration.

The slots 60 extend axially downwardly in the body section I8 to a point in radial alignment with the holes 38 when the sections I6 and I8 are in properly assembled relationship. The slots 60 are so arranged angularly of the body section I8 that their lower ends lie in radial alignment with the openings 36 when the flats 42 arere-Q.

7 ceived Yin 'the .groove 548. .This alignmentds brought out ,in.Fig...5. .AY block V512. ofresilient material and Y preferably rubber, feither natural or synthetic,` but vpreferably of a .suitable synthetic type resistant to `the action ofthe fparticular .cutting compound employed Linv a drilling operation, is tted into theupper portion ofy each slot 6U. As brought out in Fig. '7, .the radially outer .faces of the blocks G2 are preferably curved into conformance with the curvature of the bore i6 of the body section I6 and their inner ends are shaped for complementary reception in` the reliefs 3% of the lands 32 `of the drill22. :The radialdimensions of the blocks E2 are preferably such that the blocks VE32 are slightly radially compressed when the drill 22 is projected through the `drilling device so that the blocks-.62 are not only sealed with respect to the sides ofthe vslots 60 vbut are .sealedagainst the surfaces of the reliefs 35.

The blocks 62, as best brought outin Fig. 8, stop short of the lower endsof the Aslots Sil so as to leave such lower ends clearv and unobstructed for the free flow of cutting compound through theopenings and through the lower portions of the slots @il to the reliefs 3S axially of the drill towards the point thereof from the blocks 52. It might be noted, and as best brought out in Fig. 8, that where a two nuted drill is employed, the slots 6o are preferably extended from the bottom of the groovet provided in the upper end of the section .EB .for reception of the driving Lplate 5S and, as also brought out in this view, the upper ends of the slots E9 are preferably laterally widened as at 6 and the upper ends of theblock are complementarily outwardly flanged and their uppersurfacesare shaped to be hush with the bottom of theagroove 56. This outward flanging of vthe upper ends of lthe block 552 serves as a means .for anchoring such upper ends between the driving plate ll and the upper end 'of the body section I8 and thus maintain the position .of the blocks .S2 axially of the body Ill.

In order to enable a cutting compound .to be introduced through the openings 13B and the lower ends of the slots .to to the reliefs 355 inthe drill 22, and particularly where the drill is mounted for rotation and the work fixed as differentiated from those constructions. in which .the work rotates and the drill is heldagainst axial rotation, it is necessary to provide a sleeve rotatably surrounding the body It .and which may therefore be maintained against rotation `Vand through which a cutting compound may be fed. This is the sleeve I2 previously'referredto and it will be noted from an inspection of-alfig. 4 that its bore isof such diameter as-to relatively closely but freely rotatably receive the body i9 therein. While in the broader aspects of the invention it maybe mounted upon the body It in any suitable manner, in the present case it is provided with an integral vradially inwardly directed annular ange lo at its lower end of a diameter to relatively closely but rotatably receivethe lower end portion of thebody section Hltherein. The lower outer edge of the angeA oftheY bodysection I8 is out away to provide a stepped surface Al2 in which a plurality of ball .bearings .l'farereceived, and which cooperate with thebore of vthe sleeve I2 and the `upper face of the -flange Yto form a pairoiC opposedwbearings races fori-the ballflli. Theupper .endof `thebodysection I6 is, also steppedas at 76 to .forma race on-lthe body section.y I 6 .for .reception of4 asimilar-series of ball bearings f T8. :The ,balls 'I8 .bear against the-bore ofthe sleeve I2 .and also against the Ainner surface of a capmemberll which is Vthreaded upon'the upper end of the bodysleeve I2 as indicated/'iny Fig. 4. Thedimensions of theparts are such that-the flange .'I substantially .bears at its radiallyinne'r .end against the lowerface of thelange 40 radially inwardly of the stepped. portion 12, and lthercap substantially bears against the upper endof the .body section =I6, only suicient clearance remaining so as to permit free rotation of 'the body Iilwith respectto the sleeve I2. These-fits are primarily relied upon to prevent leakage. of the cutting compound between the sleeve I2- and the body I0. v:It .will .be appreciated lthata moderate'amount of leakage at .thesepoints will be of nomoment as the cutting compound'will ordinarily floodboth theworkfand the device-.of-the present -inventionduring Voperation land the volume of cutting compoundssupplied 4tothe device will be little affected .if any by the v-amountof cutting compound that may leak past these .vcooperating surfaces.

In order to introduce the cutting compound through the sleeve I2 to the openings 30 and particularly to the groove 28 which communicates with the openings 30, the sleeve I2, as-best broughtl out in Figs. 1 and 5, `is provided Witlra radial opening 82 therethrough which, as brought out in Figs. 2 and `5 is threaded for reception of the inner end of a short nipple or pipe section 84 which may be connected by means of exible holes -such as 86 or the like to a suitable source of cutting compound or other liquid-under the -de sired pressure. As brought out in` Fig. vfthe sleeve I2 in lateral alignment 4with the opening 82 is internally provided-with an annular groove 88, the groove thus being in matched and opposed relation with respect to the groove 28lln the body section I6. Thus,g.the cuttingcompound introduced through the opening 82 lis* communicatedthrough 360 with the groove 28-from which the. openings 30 project inwardly through the upper body section I6 inradial alignment with the lower ends of the slots 60 in theinner body section I5, vthe lattery of-whilch are maintained in alignment with the reliefs 36 -inthe lands 32 as previously described.

As previously mentioned,vin my copending application above referred to the drilling devicewas preferably constantly maintained in contact with the 4work being drilled, or ther-jig in which the work was supported, preferably-by spring means, and the body of the device was in actual contact with suc-h Workor -jigand consequently, rotated relative to it. Wear was therefor engendered between -the-drillingdevic'e and the work or jig. In the device of the present invention this iwear is obviated by the use of -thernosepiece I4. best brought out in YFig.,4,the nosepiece |74 comprises a hollow member, the upper end `of which is suitably secured tothe lower end of the sleeve I2. While the nosepiece ,M'may Abe securedlto the sleeve I2 in any suitable manneraawrorinstance, by a threaded'connection 1or the'like, in the particular case shown` it is assumed to have a press t-thereon and is axiallylapplie'deagainst a `shoulder formed exteriorly on the sleeveHIZ, thereby definitely positioningthe nosepiece-l with respect to the sleeve'lZl The lower end of the nosepieceM, which isAreduoedinfsizeand joined to the upper end by a' frusto-fconical por'. non, is provided witna bore 92 in wlgieh the A(1h11 22--is relatively closely but'ffreely rotatably-received.V Thelnosepiece I4 is also provided with of illustration is as follows.

'one or more openings 94 therein for the escape 'of the cutting compound and chipsmdischarged 'from the flutes 34 during the drilling operation.

the sleeve I2 and nosepiece I4, so as to provide a proper seal between these parts to prevent the cutting compound which is being fed down the ing at this point. While any suitable t may be provided between these parts that shown by way the body section I8 is provided with a frustoconical surface 96 complementary to the frustoconical inner surface 98 of the nosepiece I 4, and these parts are so arranged that when the device is assembled together, as illustrated in Fig. 4, the surface 98 substantially abuts the surface 96.

` Thus, "in the construction as described, the device of the present invention is projected axially against the work, or jig which supports the work. so as to prevent the cutting compounds in the reliefs 36 from escaping between the end of the nosepiece I4 and the work or jig during a drilling operation. Preferably, some spring means is provided for this purpose, as for instance in the manner illustrated in my copending application above identified. 4 Actual contact between the device of the present invention and the work or jig is not essential for proper operation of the device, however, as it has been found that even though the device of the present invention may be spaced at as much as one-quarter of an inch from the work or work holding jig, the cutting compound in flowing through the reliefs 36 has a tendency to adhere the reliefs and will jump such a gap where it is unconfined except by the walls of the reliefs without unduly lessening either the ilow of the cutting compound to the tip of the drill or the pressure of the compound. In any case with the preferred arrangements in which the nosepiece I4 actually contacts the work or the work holding jig, it will be appreciated that there will be no relative rotation between the nosepiece and the work or jig which will tend to set up any wear between these parts.

Perhaps a more important result of adding the nosepiece I4 is the effect of the centrifugal action of the body I through the slots 44 in ejecting the cutting compound in the slots from the bore being drilled. In such case, the slotted lower end of the body section I8 serves in the nature of a centrifugal pump rotor and the nosepiece I4 serves in the nature `of a casing for such rotor. The result is that a relatively efficient centrifugal pump is produced whose inlet is constantly exposed to the flutes 34 of the drill 22 and therefore tends to create a suction which is exerted through the `flutes 34 to the point of the drill. Such suction tends to withdraw the cutting compound from the bore being drilled along with the chips being cut in the bore and ejecting them from the device through the openings 94 in the nosepiece I4.

` It will be appreciated that in any drilling operation there are two features which are of material importance in determining the speed at which the drilling operation may be carried on. Oneof these is the ability to prevent the point of the drill from being heated to such an extent as to break down its cutting edges, and the other, whichuis particularly important in drilling deep holes, is the ability to remove the chips from the lreliefs 36 in the lands 32 to the work fromvescap- The lower end of .v

,.10 v bore so as to prevent these from becoming packed and jammed between the drill and the bore, not only heating up the drill and the work itself but endangering breakage of the drill. Because Aof the fact that the device of the present invention enables unusual quantities of cutting compound to be projected to the point of the drill, as compared to ordinary oil hole drills, the fact that this cutting compound is in direct contact with the walls of the bore being drilled and therefore prevents the work as well as the drill from becoming heated, and because of the ability to rapidly discharge the chips from the bore and prevent them from becoming packed and jammed between the drill and the work, both because of the added amount of cutting compound capable of being employed and the suction effect on the flutes o f the drill by the centrifugal pumping action above described, actual tests show that holes maybe drilled at a speed and a feed with the device'of the present invention at rates far above those possible with conventional oil hole drills and at rates that have heretofore been commercially impractical. l Y

Formal changes may be made in the specific embodiment of the invention described without departing from the spirit or substance of the broad invention, the scope of which is commensurate with the appended claims.

I claim:

1. In a drilling device of the class wherein there is a body having a central boreKthere-f through adapted to closely but slidably receive a drill therein which drill is provided with reliefs in the lands thereof, means are provided "for cooperating between the body and the drill to cause themto be non-rotatably associated with each other, the body is provided inwardly of its forward end with openings aligned with the reliefs of the drill when'the latter is received therein, said body is provided with passages therethrough at its forward end aligned with the flutes of the drill when the latter is received therein for the escape of chips or the like, and a sleeve-like member rotatably surrounds the body and is provided withl a passage therethrough for introducing a liquid therethrough to the open ingsV in the body leading to the reliefs in the lands o f the drill, the lcombination withV said. sleeve-like member of a nosepiece carried there# by, said nosepiece substantially abutting the forj-- in the lands thereof, means are provided for' cooperating between the body and the drill tov cause them to be non-rotatably associated with each other, the body is provided inwardly of itsA forward end with openings aligned with the re,-

liefs of the drill when the latter is received there--A in, said body is provided with passages there-',- through at its forward end aligned with the flutes of the drill when the latter is received therein for the escape of chips or the like, andA a sleeve-like member rotatably surrounds the.

body and is provided with a passage therethrough for introducing a liquid therethrough to the 0pen` ings ,in the body leading to the reliefs inthe lands of the drill, the combination withv saidsleeve-like member of a hollow nosepiece fixed with respect to said sleeve-like member in surrounding" relationship with respect tothe forward e'nd or said body 'and' prov'i'i'iedA with passages therethrough ior the 'escape'or' chips therefrom, wlierebysaid nosep'ieceiofms a pomp casing, tne rotorjor which consists or lsaid rorward end or" said'h'ody. i Y

3'. Iri a drilling device oi the class' wherein theree is a body having a centralA borev therethrough adapted to closely butV slidably receive ajjd'lill 'therein which 'drill is provided with reliefs inlthe lands thereof, means are provided for' cooperating between the bodyv and the drill te'caus them tofbe non-rotatably associated witlif each other, the lbod'yis provided inwardly oi-'it's' forward end with openmgs'al'igned with the'reliefs of the drill when the latter is received therein, said body provided1 with passagesV therethrough at its forward'- end aligned' with the fltesoifthe drill when the latter received therein "for the escape' oi' vchips or the like, and a-sleevelike Vmember rotatably surrounds the body andisL provided with'a passage therethrough irintroducing va'liduid therethrough'to the' openings in the body leading to the reliefs 'in' the lands-'of the drill, the combination' with said sleeve-like member of :a hollow nos'epie'c'e Vfixed virith respect tl'i'e'ereto, said nosepiece having a tapered inner surface arranged in substantially abutting relation"with the Iorwardlen'd of said body and extending axially therebeyond.V

4? In a drillingd'evi'ce of the classtwhereinithere is-^abodyy having 'a central' bore therethrough adapted to' closely-butl slidably receive a drill therein: which drill is" provided with're'liefs in the landsthereof, means areV provided for co'- operating' betweeny the body' and the'drill to' cause A'them to be nonerotatably A associated with eachr other, the body is provided inwa'r'diy' `of its forward end' With openings aligned with' the" reliefs' 'of 'the` dr`ill"when` the' latter is receivedtherein; said'bodyis provided with passages therethrough at its' forward end aligned with the notes of the drm when the naar' is Arenamedy therein' for the escape of chips or the like, and

a.v` sleeve-like" member rotatably surrounds the and providedI with a passage therethrough" for introducing. aA liquid therethrough to the openings in the body leading to the reliefs the lands ofv the drill, the combination with said sleeve-like member of a hollow nosepiece ixed with respect thereto in surrounding relation withrespect to the forward end oisaidY body, said nosepiece arranged vin close substantially abutting but relatively rotatable relation-with rel spect tothe forwardv end-of the bodyysaid nosepiece projecting axially beyond said forward endl of said body and being providedy with a- -boref therein of the same size as and concentric with the bore of said body.- 1

5.-In a drilling device of the type described,

a rbody member having a bore therethroughA adapted to closely but axially slidably receivea drillitherein and comprising a pair of axially separable sections non-rotatably engaging onel another and providing apair ofv axially opposed faces, one of said axially opposed faces having a diametrical" groove therein, anda driving membei' confined Airi said groove between said faces,-

said driving member having an opening therethrough" concentric with the bore of`v said bodyA member and' shaped to'ax'ially slidably but nonrotatabl'y' 'receive said' drill therethrough.

61;' InL a drilling device' of the type described, a bodyhmembei" comprising a pair` of axially separable sections vhaving aligned openings therein ci a size to" closely butvslidably receive audr'ill therein, said sections having'v telescoping portions, the inner' of said sections having a'generallyradially directed passage therethrough within'tlie telescoping portion thereof, means non-rotatably associated with said body member and the'drill adapted to be received thereby operable to main'- ta'in a land voi ysuch' drill when received by' said body member in radial alignment withsaid passage, a'nd a blockv of resilient material conned in said passage and Vadapted to bear on a land of such Vdrill,`th`e 'radially' outer'of said 'telescopi ing portions maintaining said block of resilient material againstjradially outward displacement.

7.' Irl a arming' device 4ofY the type' described, a body member hav'ingaV central bore therethrough adapted' Vto closely= but slidably rec'e'ive` a drill therein'and comprising'ra pairv'of axiallysepafrable' sections having axially opposed faces `and telescopirfier portions-one of said sections having a generally axially directed slot therethrough extending from its said face, means' non-rotatably associated with onecf said sections adapted to s'lidably'but' non-rotatably engage such" drillwlien received 'by said 'body member and maintain )a land thereof in 'substantial radialalignment with said slot, the axially open end of said slot being clrcuirffeienti'ally widened, and a block of reement material' received' ih said slot and havihg'a portion complementary to saidiwidened'end of said slot received thereiny and maintained therein bythe otherr of said facessaid blockfbeing adapted to bear against 'a land of said drillwhen the latter is received by' said body member. A

8'. In a' drilling device of the type described, a body meinber'comprising a pai-rior axially'sepa'-` rable sectionsV having aligned bores thereinf adapted to'closely: but slidably receive a drill' therein, said sections having: telescopin'g portionsy incllding axially opposed faces, the radially innerv ofv'said portions having a dia'netric'al slot in the" end' thereof, a driving member non-,rotatably'receivedin said slot and co'nned therein' by' the" other of' said 'facearsaid' drivihgihember having" an' opening therethrough in alignment with tlie bores saidse'ctionsand shaped to slidably but non-rotatably receive' said' drill, said inner of said portions having a generallyaxiallyl directed Slot theietl'irol'gh eXte/lidingr fIOm Saidfa'c'e thereof, said slots being angularlyspaced from' eachV other about the axis of said 'body member in' accordance with the angular spacing.

of thelandsof said drilland being so related to said' driving 'member as' to be maintained in radial alignment with" said lands vof said drill,TV anda (block of resilient material receivedy in eachb fable' Sections having aligned bores thereifhv adaptedw to closely but slidably receive a'drilL4 therein, said sections having telescoping portions including axially opposed faces, the radially inner of said portions'having a diametrical slot in the end thereof, a driving member non-rotatably received in said s lot and confined therein by theother of said faces, said driving member having.. an "opening therethrough in alignment with the;

bores in said sections' and shaped to slidably butv non-rotatably 'receive said drill, said rinner 0i' said portions having a generally axially directed slot therethrough extending from said face thereof, said slots being angularly spaced from each other about the axis of said body member in accordance with the angular spacing of the lands of said drill and being so related to said driving member as to be maintained in radial alignment with said lands of said drill, and a block of resilient material received in the axially outer end of each of said slots, each of said blocks having means thereon cooperating with the corresponding of said sections maintaining said blocks against relative axial movement with respect thereto, the radially inner faces of said blocks being adapted to be pressed against the lands of said drill and said blocks being maintained against radial outward displacement by the outer of said telescoping portions, the axially inner ends of said slots being unrestricted by said blocks and the outer of said telescoping sections having openings therethrough in radial alignment with the axially inner ends of said slots.

10. In a drilling device of the type described, a body member comprising a pair of axially separable sections having aligned bores therein adapted to closely but slidably receive a .drill therein, said sections having telescoping portions including axially opposed faces, the radially inner of said portions having a diametrical slot in the end thereof, a driving member non-rotatably received in said slot and conned therein by the other of said faces, said driving member having an opening therethrough in alignment with the bores in said sections and shaped to slidably but nonrotatably receive said drill, said inner of said portions having a generally axially directed slot therethrough extending from said face thereof, said slots being angularly spaced from each other about the axis of said body member in accordance with the angular spacing of the lands of said drill and being so related to said driving member as to be maintained in radial alignment with said lands of said drill, a block of resilient material received in the axially cuter end of each of said slots, each of said blocks having means thereon 14 cooperating with the corresponding of said sections maintaining said blocks against relative axial movement with respect thereto, the radially inner faces of said blocks being adapted to be pressed against the lands of said drill and said blocks being maintained against radial outward displacement by the outer of said telescoping portions, the axially inner ends of said slots being unrestricted by said blocks and the outer of said telescoping sections having openings therethrough in radial alignment with the axially inner ends of said slots, a sleeve rotatably surrounding said body member, means maintaining said sleeve against relative axial movement with respect to said body member, a nosepiece carried by said sleevelike member in fixed relation with respect thereto, said nosepiece being hollow and extending into surrounding relation with respect to the forward end of said body and axially beyond said body, said forward end of said body having radially directed passages therethrough maintained in radial alignment with the utes of said drill when the latter is received by said body for the escape of chips from said ilutes and said nosepiece being provided with passages therethrough for the escape of chips therefrom, said forward end of said body with said passages therethrough serving as a rotor for a centrifugal pump and said nosepiece serving as a casing for said pump, whereby to create a suction effect on the flutes of said drill during rotation of said drill and body.

RUDOLF W. ANDREASSON.

REFERENCES CITED rhe following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,027,520 Blood May 28, 1912 1,109,836 Hanson Sept. 8, 1914 2,231,864 Abel Feb. 18, 1941 2,301,151 Spievak Nov. 3, 1942 2,409,525 Andreasson Oct. 15, 1946 

